Il 19/06/2012 13:05, Stefan Hajnoczi ha scritto: >> > I picked up this logic from block/raw-posix.c:raw_open_common(). Don't see >> > anything related to bs->enable_write_cache there. Will find out more about >> > bs->enable_write_cache. > If you fetch the latest qemu.git and check bdrv_open_common() there is > new code that stashes BDRV_O_CACHE_WB in bs->enable_write_cache and > then opens the actual block driver with BDRV_O_CACHE_WB set. You can > use bdrv_enable_write_cache() to test the original flag.
Yes, but you shouldn't do this when opening. You should always open for writeback. Paolo
